#:use-module (gacela ftgl)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
- #:export (with-color
+ #:export (init-video
+ get-screen-height
+ get-screen-width
+ get-screen-bpp
+ resize-screen
+ quit-video
+ clear-screen
+ flip-screen
+ set-2d-mode
+ set-3d-mode
+ 3d-mode?
+ get-current-color
+ set-current-color
+ with-color
progn-textures
draw
load-image
draw-rectangle
draw-square
draw-cube
- add-light
translate
rotate
to-origin
+ add-light
set-camera
camera-look
load-font
render-text))
+;;; Screen
+
+(define init-video #f)
+(define get-screen-height #f)
+(define get-screen-width #f)
+(define get-screen-bpp #f)
+(define resize-screen #f)
+(define quit-video #f)
+
+(let ((screen #f) (flags 0))
+ (set! init-video
+ (lambda* (width height bpp #:key (mode '2d) (title ""))
+ (cond ((not screen)
+ (SDL_Init SDL_INIT_VIDEO)
+ (let ((info (SDL_GetVideoInfo)))
+ (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
+ (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
+ (if (= (assoc-ref info 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
+ (if (= (assoc-ref info 'blit_hw) 0) 0 SDL_HWACCEL)))
+ (set! screen (SDL_SetVideoMode width height bpp flags))
+ (SDL_WM_SetCaption title "")
+ (init-gl)
+ (if (eq? mode '3d) (set-3d-mode) (set-2d-mode))))
+ (else #t))))
+
+ (set! get-screen-height
+ (lambda ()
+ (surface-h screen)))
+
+ (set! get-screen-width
+ (lambda ()
+ (surface-w screen)))
+
+ (set! get-screen-bpp
+ (lambda ()
+ (surface-format-BytesPerPixel screen)))
+
+ (set! resize-screen
+ (lambda (width height)
+ (cond (screen
+ (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags))
+ (resize-screen-GL width height)))))
+
+ (set! quit-video
+ (lambda ()
+ (SDL_FreeSurface screen)
+ (set! screen #f)
+ (SDL_Quit))))
+
+(define (clear-screen)
+ (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT)))
+
+(define (flip-screen)
+ (SDL_GL_SwapBuffers))
+
+
+(define set-2d-mode #f)
+(define set-3d-mode #f)
+(define 3d-mode? #f)
+
+(let ((mode '2d))
+ (set! set-2d-mode
+ (lambda ()
+ (set! mode '2d)
+ (glDisable GL_DEPTH_TEST)
+ (resize-screen-GL (get-screen-width) (get-screen-height))))
+
+ (set! set-3d-mode
+ (lambda ()
+ (set! mode '3d)
+ (glClearDepth 1)
+ (glEnable GL_DEPTH_TEST)
+ (glDepthFunc GL_LEQUAL)
+ (resize-screen-GL (get-screen-width) (get-screen-height))))
+
+ (set! 3d-mode?
+ (lambda ()
+ (eq? mode '3d))))
+
+
+(define (init-gl)
+ (glShadeModel GL_SMOOTH)
+ (glClearColor 0 0 0 0)
+ (glEnable GL_BLEND)
+ (glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA)
+ (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST))
+
+(define (resize-screen-GL width height)
+ (glViewport 0 0 width height)
+ (glMatrixMode GL_PROJECTION)
+ (glLoadIdentity)
+ (cond ((3d-mode?)
+ (let ((ratio (if (= height 0) width (/ width height))))
+ (gluPerspective 45 ratio 0.1 100)))
+ (else
+ (let* ((w (/ width 2)) (h (/ height 2)))
+ (glOrtho (- w) w (- h) h 0 1))))
+ (glMatrixMode GL_MODELVIEW)
+ (glLoadIdentity))
+
+
+;;; Drawing
+
(define get-current-color #f)
(define set-current-color #f)
(insert-resource-into-cache key texture)
texture)))))))))
-;; (define* (draw-image filename #:optional (zoom 1))
-;; (let ((texture (load-texture filename)))
-;; (cond (texture (draw-texture texture zoom)))))
-
(define* (draw-texture texture #:optional (zoom 1))
(cond (texture
(let ((width (texture-w texture))
(glNormal3f -1 0 0)
(draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) :texture (or texture-6 texture) #:color (or color-6 color)))))
-(define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
- (init-lighting)
- (and light (glLightfv id GL_DIFFUSE (first light) (second light) (third light) (fourth light)))
- (and light position (glLightfv GL_POSITION (first position) (second position) (third position) (fourth position)))
- (and ambient (glLightfv id GL_AMBIENT (first ambient) (second ambient) (third ambient) (fourth ambient)))
- (and turn-on (glEnable id))
- id)
-
(define* (translate x y #:optional (z 0))
(glTranslatef x y z))
(define* (rotate #:rest rot)
- (cond ((3d-mode?) (apply 3d-rotate rot))
- (else (apply 2d-rotate rot))))
+ (cond ((3d-mode?)
+ (apply 3d-rotate rot))
+ (else
+ (apply 2d-rotate rot))))
(define (3d-rotate xrot yrot zrot)
(glRotatef xrot 1 0 0)
(glLoadIdentity)
(cond ((3d-mode?) (camera-look))))
+
+;;; Lights
+
+(define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
+ (init-lighting)
+ (and light (glLightfv id GL_DIFFUSE (first light) (second light) (third light) (fourth light)))
+ (and light position (glLightfv GL_POSITION (first position) (second position) (third position) (fourth position)))
+ (and ambient (glLightfv id GL_AMBIENT (first ambient) (second ambient) (third ambient) (fourth ambient)))
+ (and turn-on (glEnable id))
+ id)
+
+
+;;; Camera
+
(define set-camera #f)
(define camera-look #f)
projects / gacela.git / blobdiff